Which statement about open-loop control is true?

• A. It does not depend on feedback to control position
• B. It uses sensors to adjust output
• C. It continuously corrects errors using feedback
• D. It requires dynamic calibration

Answer: (A)

Open-loop control sends a preplanned command to the system without checking the result, so it does not use feedback to adjust the action. This means the output is determined solely by the input signal and the assumed behavior of the plant, and it won’t correct for disturbances or errors that occur during operation. For example, moving a robotic arm by applying a fixed motor command for a set time without measuring the actual position will land somewhere based on the model, not on real-time feedback. Because it relies on no feedback, it won’t automatically correct errors, and it doesn’t require dynamic calibration as part of its operation.